diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index a9ff595e07..5e9f3770db 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -1,4 +1,8 @@
 pr: none # comment out this line if you need to test this file on PR
+trigger:
+  branches:
+    exclude:
+      - trunk # master (mirror of trunk) runs CI
 jobs:
 - job: Linux
   pool: